[clang] [NFC][analyzer] Remove StmtNodeBuilder (PR #181431)

[Balázs Benics via cfe-commits]

steakhal wrote:

About your plans. I'm gonna be honest with you that my approach was so far to find something similar to what I want and copy paste it. Then carefully check the exploded graph to see if it's correct.
Objectively, the engineers were really smart and had so many abstraction layers over time, and only few of them made long term sense.
I don't mind and I actually want to encourage anyone simplifying things. One way is to try to get rid of something and if it was easy, then chances are that the "thing" wasn't really needed after all.
I like where this is going.


https://github.com/llvm/llvm-project/pull/181431